Machine for trimming wall paper



Dec. 13, 1927. 1,652,522 E. c. F. ERNST MACHINE FOR TRIMMING WALL PAPER Filed Feb. 21. 1927 2 Sheets-Sheet 1 INVENTOR 4 Dem 1 3, 1927. 1,652,522 1 E. c. F. ERNST MACHINE FOR TRIMMING WALL PAPER Filed eb- 1. 1927 2 Sheets5heet 2 z f f i Patented Dec. 13,- 1927.

E GENE-oar. nnnsror PITTS URGH, PENNSYLVANIA.

MACHINE FOR TR-IMMING' WALL PAPER.

Application filed February 21, 192p Serial 1%. 169,715.

My invention refers to'animprovement in machines for tI'lIIlHllIlgj'OllS of paper, or is especially designed similar material, and for the purpose of trimming the blank or surplus edges of wall paper. It has in view to provide a light, port-able, self-contained device, capable of being easily handled and manipu1ated, with means for adjustment to different lengthof rolls, means for'simultaneously slitting the paper'at eachedge as it is unrolled fromthe. original roll andrerolled, means for adjustment to varying lengths of rolls, and other features of construction and operation as shown in the 1 drawings and hereinafter described.

In the drawings:

Fig. 1 is a plan view of the machine, with V the paper'rolls in position;

Fig. 2 is a front elevation from the opposite side; Fig. 3 is an end view of Fig.2, showing the winding crank; I J 1 Fig. 4 is a cross section on the lineIV-IV 2 Figs-5 is a similar, cross section,bu't sh owing the original paper roll reversed;

. Fig. 6 is afull sizeplan view ofone end of the machine, showing the adjustable sup porting bracket; I

' Fig. VII,VII of Fig. 6, on the samefscale, as fFigs.4and5; J"

Fig., 8 is a detail view, showing the locking Hatch for'the trimmed roller shaft; 2

Fig. 9 is ajsectional detail view, showing the cutting mechanism at one end of the tension roll; and i- ,1 i

Fig; 10 is a partial detail view in perspective, showing the winding roll.

The main framework' of the machineconsists of endmost bracket light sheet metal, as aluminum, secured against the ends of a main cross board or base member 3 in any suitable way. At their upper portions, brackets 2 are each provided with open sockets 4 for rotatablysupporting "the roll-supporting r0d'5, which is shoulgdered and grooved to rotatablyflseat in each such socket, against endwise movement, and carrying the untrimmedroll A. At the 7 lower opposite side of the gmachine is a winding shaft; 6 having endmost bearing studs7,8, journalledin bearing slots 9 of plates 2, and held against accidental removal .45 by ivoted locking kee era 10, slotted at 11, to fit ever and secure t e studs while in use;

tube, for lightness.

7 isa cross sectionon thee line plates 2, 2, of thin,

Shaft 6, which may be of wood, is preferably OfStlfilCiGDtdiameter to form a good winding rod of ample diameter, and stud 8' isextendedsufficiently. to attach a turning crank12 for winding the trimmed roll B. Shaft 6 is preferably grooved, as at 13, so

that a rod 14 may be inserted before winding, which rod extends peripherally beyond the shaft, and is easily removable endwise. By this means, the wound and trimmed roll mayf'be easily loosened for free removal, without binding. V

The cutting or slitting of the margin of roll A on the severing line aat each end is effected by means of annular grooves 19 at each end of an intermediateroller 16 journalled by shaft extensions 17 in end plates 2, and provided with limiting abutments '18 at each end. The ends of roller 16 are pref erably solid, providing hubs 41 having at each end; the. annular cutting groove 19, while the bodv ofthe roll is I C'oacting cutter' wheels or disk knives 20 are securedrto rotatable supporting rod'21 ,byhubs 22, and the outer endsi'of rod 21 are Inountedin swinging brackets 23 pivoted to each end plate 2,;as at 24. Clearance slots 25 are'cutin the endplates, providing for outward swinging of the rod'21 and disks 20. awayffrom cutting relation to grooves 19and for removal of the rod "and disks for repair, sharpening, etc.,' when desired. A middle supporting bracket 26 for the rod, having an open-sided, bearing, extends upwardly from the base,

as shown. 7 The cutting disks 20, are preferably flat atone sideand chamfered or beveled on'the other side, as shown, so that a close cutting engagement -is provided by, adjusting the flat side of each inwardly extendingdisk against the shoulder of the clearly shown in Fig. 9. 1

Each end plate isnprovided at suitable locations with slots 26, 27, for rotatably sup:

' porting the stems. of adjustment rollers 30, 31,-having terminal necks 28, 29. Suchrollers are'for pressing the paper strip against roller16 as it is drawn around'in winding.

By means of thus locating the'cutting mechanism, intermediate between the original roll A and the windingishaft f roll B, the strip is drawn around roller 16 under tens on, and-a smooth clean shearing cutis effected. at each end.

r as roller Shea s is mates, theaters of a polished groove 19, as p all) strip, as well as the outermost severed strips, are simultaneously wound upon it. hen the entire roll is cut, all three may be removed by throwing back keepers 10, lifting out the cut roll on its shaft 6, and removing the rod l-il, whereupon the middle trimmed roll and the endniost severed rolled-up waste edges may all be easily'se nirated from the shaft.

In the use of the machine, as illustrated in Figs. 3 and l, the inner figured surface of the original uncut roll A becomes the outer figured surface of the cut roll B. In such use, the strip leads off from roll A around roller 16, without the necessity of pressure and'guide roller- 30. d hen, however, it is desired to roll up the trimmed strip with the figured surface inside, like the original roll. said roll A is reversed end for end, as

in Fig. 5, in which case, roller 30 is inserted,

pressing the strip against roller 16 to stretch it tightly over the slitting groove 19 at each end. It will he understood, oitcourse, that both rollers 37 and 3'1 are easily moved out of operative position by (lXl'tllFilUllSlOtES 26 and 27, having the crooked neck terminal bearings 28, 29, for easy insertion of the next uncut strip. It will be observed that roller 16 is limitedagainst endwise movement, with grooves 19 in fixed relation to slitting: disks 20. Also, that the flat side of each disk bears against the hat face of the grooved hub at one side of the groove, at each end of the roller, By such arrangement, the disks 20 being accurately set and adjusted by set screws of babe 22, a clean severing cut of the paper is en sured. A further advantage isthat by thus maintninjina the face of each knife disk in moderately tight engagement against the side of the groove, the knife constantly sharpened by side friction as it is used. thus maintaining its elliciency.

The rotation of the knife disks i0 and stem 21 constantly maintains them in rotative operative position until the entire roll is trimmed. and when a new roll is introduced, the knives with their red are merely removed outwardly through clearance slots 25 by rocking movement of brackets 523 at each end.

Vlule the machine as designed is suitable for the trimming of the usual standard lengtlrwall paper roll, there are, however, sometimes slight variations in such standard length, 1iecessitatin; adj ustl uent mechanism,

for which purpose my machine is provided witha supplen'rental supporting bracket 32. Said bracket is made of thin sheet metal, and is provided with a supporting toot piece 33, secured to base 3 by washers and screws 3st, through slots The main bracket 32 extends upwardly parallel with the adjacent end plate 2, having an enlarged head portion 36 for hearing engagement against the end of the trinnned roll B. The bracket is cut out for clearance, as at 37, forthe winding shaft (3, and extends upwardly and rearwardly by a terminal forbearing engage ment against the end of original uncut roll A.

length, more or less than the usual standard length of a commercial mu, may be compensated for, that: the trimmed strip as drawn therefrom and wound upon the shaft 6 will be of the proper width. The roll will also be continuously and. positively guided and maintained, ensuring perfect alinement and correcting any tendency toward; deviation, resulting in proper trimn'iing.

For purposes of easily lifting or moving, the machine, it is provided at each end with a grasping handle or hook 42.

The construction and operation of the machine will be readily understood fromthe foregoing description. It is conmaratively simple and economical in manufacture, and is capable of continuously carrying out its intended functions without variation or ad justrnent other than as described. Inf relllOViDfI the trimmed roll 13 and in introducinn a fresh untrinuned roll A, it is merely necessary to insert. the rod 5 loosely through the hollow center of the untrinnned roll and to locate the necks of the rod in the bearing slots 4-. The tree end of the strip is then passed around roll '16, and the knife gglisks 20 with their shaft 21 are thrown lunvardly, as in Fig; 4, making aninitial cut through the paper at each groove 19. Thereafter, the strip is drawn through, effecting slitting,

and is secured to shaft 6, and woundthere on, after which the winding operation continues, drawing the entire strip around roller 16, efiectinu the slitting or severance of the margin at each end, which isalso wound up on shaft 6, and eventually removed, as described.

What I claim is:

1; In combinatioma base piece having upwardlyextending end plates provided with slotted bearings for an unwinding shaft, smnlar slotted bearings for a winding shaft,

pivoted slotted keepers for the winding shaft, a tension roll in the path of movement between said bearing locations having annular SllQftl'lDiZ slots at each end,and coacting shearing disks.

In combination, a base piece having upwardly extending end plates provided with annular shearing slots at ing shearing disks extending into said slots,

pivoted slotted keepers for the winding shaft, a tension rollin the path of movement between said bearing locat ons having each end, co-act and an adjustable ca'rrying'shaft therefor.

3. In combination, a base piece having upwardly extending end plates provided with slotted bearings for an unwinding shaft, similar slotted bearings for a winding shaft, pivoted slotted keepers for the winding shaft, a tension roll in the path of move ment betweensaid bearing locations having annular shearing slots at each end, co-acting shearing disks extending into said slots, slotted bearings in theend plates, and an adjustable carrying shaft for the shearing disks operably mounted in said bearings. v

4. In combination, a base piece. having upwardly extending end plates provided with slotted bearings for an unwinding shaft,

- similar slotted bearings for a winding shaft,

pivoted slotted keepers for the winding shaft,

a tension roll in the path of movement be tween said bearing locations having annular shearing slots at each end, co-acting shearing disks extending into said slots, slotted bearings in the end plates, and pivoted supportingarms for the disk shaft adapted to swing it through said slotted bearings.

5. In combination, a base piece having upwardly extending end plates provided with slotted bearings for an unwinding shaft, similar slotted bearings for a winding shaft,

pivoted slotted keepers for the winding shaft,

a tension roll in the path of movement be- 7 tween said bearing. locations having annular shearing slots ateach end, co-acting shearing disks extending into said slots, and loosely mounted guide rollers rotatably mountedin the end plates adjacent the tensionrolL 6., In a machine for slitting the edges of wall paper, a tension roll around which the paper is drawn provided with slitting grooves at each end, end plates for supporting the tension roll having slotted bearings, and. a guiding roller rotatably mounted in said slots.

'7; In a machine for slitting theedges of wallpaper, a tension roll around which the provided with slitting paper I is drawn grooves at each end, end plates for supporting the tension roll having slotted bearings, a rocking shaft extending through said slotted bearings provided with rotatable cutting disks operable in porting arms therefor plates.

8. In combination with a paper trimming machine having a base and end plates and slotted bearings for an untrimmed r011 shaft and atrimmed roll shaft, an end bearing plate for the roll end having afoot piece, means for adjustably securing it to the base, and a set screw mounted in the end plate and engaging the end bearing plate.

pivoted to the end In testimony whereof I hereunto afiix my signature.

EUGENE O. F. ERNST.

said slots, and sup- 

